Aerosol valve



P. MESHBERG June 3, 1958 AEROSOL VALVE 5 Sheets-Sheet 1 Filed May l0,1957 INVENToR. P/zl//'U Mes/@eff TTURNEYJ' June 3, 1958 P, MESHBERG I2,837,249

AEROSOL VALVE Filed May l0, 1957 3 Sheets-Sheet 2 142W il Z y frINVENToR.

P. MESHBERG Ju'ne 3, 195s AEROSOL VALVE Filed May 1o, 1957 3Sheets-Sheet 3 .1. Urin?? i. wenn INVENTOR. P! Z1 /U M65/7&3?

HTY'OENEYS Unted States `Patent AEROSOL VALVE Philip Meshberg,Fairfield, Conn.

Application May 10, 1957, Serial No. 658,283

18 Claims. (Cl. 222-394) The present invention relates to aerosol valvesand more particularly to the stems utilized therein and to the means formounting the valves on the container.

it is an object of the present invention to provide an improved two-partvalve stem which can be more readily manufactured and assembled andwhich, when used in structure which permits easier sliding of the valvein the valve disks during its operation. Further, the tubular two-partstem can be readily provided with means to greatly facilitate pressurefilling of the containers with the valve in position.

Another object of the present invention is to provide improved measuringchambers and 'means for mounting the same in the containers wherebychambers of varying diameter for dispensing predetermined varyingamounts of fluid can be readily mounted in the container withoutsubstantially varying the container. Furthermore, in order to obtainaccurate volumes of the `aerosol material, the spring normally urgingthe valve stem into sealing relation can be mounted on the outside ofthe measuring chamber so as not to affect the volume of dispensed iluidas controlled by the measuring chamber. Other features and advantages ofthe invention will be apparent from the specification and claims whenconsidered in connection with the drawings in which: 1 Figure l is alongitudinal sectional view of a valve mounted on the container with thevalve in normal sealing position. Fig. 2 is a View similar to Fig. 1showing the valve in dispensing position.

Fig. 3 is a longitudinal sectional view of a valve in pressure fillingposition. v Fig. 4 is a longitudinal sectional view of a valve with thespring disposed on thel outside of the container.

Fig-5 is a longitudinal sectional view of a valve having a springdisposed outside of the measuring chamber and within the container. l

Fig. 6 is a view, partly in longitudinal section, showing a valvemounted in a measuring chamber of large diameter. Fig. 7 is -a view,partly in longitudinal section, showing the valve mounted in a measuringchamber of small diameter.

Fig. 8 is a longitudinal sectional view through a valve having a sealingbutton. Fig. 9 is a top View of the button.`

Fig. l() is a sectional view taken along line 10-10 of Fig. 8.

lice

Fig. l1 is a bottom view of Fig. 8 looking in the direction of thearrows 11-11.

Fig. 12 is a view of a valve mounted on an open-mouthed bottle.

Fig. 13 is a view of the bottom of the dip tube.

Fig. 14 is a longitudinal sectional view of the portion of the dip tubeshown in Fig. 13.

Figs. 15 and 16 are longitudinal sections of valves showing another formof stem.

,As shown in Figs. l vand 2 of the drawing, a container 10 has mountedthereon a metering valve 11 adapted to dispense from the container ameasured amount of uid under pressure. The valve comprises a measuringchamber 12 adapted 'to be mounted on the container and is provided witha sealing valve disk 13 at the upper end thereofand a sealing valve disk14 at the lower end thereof, said valve disks being made of suitableelastomeric material.

In the form of the invention shown in Fig. l, the measuring chamber isenlarged at the upper end in order to secure the required volume offluid for each operation of l the valve and is provided with anoutwardly extending radial'ange 15 provided at its periphery with arearwardly extending iiange 16 which is adapted to be forcedlit into aneck 17 on the means for mounting the valve on the top of the container.p

The sealing valve disk 13 is mounted to overlie the outer end of thechamber and is adapted to be located `under the domed end wall 18closing the neck 17 and is held in place by being clamped tothe flange15 by the indented portion 18a of the end wall so that the center isfree to flex in operation.

In the form of the invention shown in Figs. l and 2, where a `chamber oflarge diameter is employed, means are provided to control the flexing ofthe sealing disk. While this may take many forms, it is hereinillustrated as a plate 19 disposed between the disk and the end of thechamber and extending over the open end of the chamber and'limits theinward exing of the sealing disk when the valve is in dischargedposition of Fig. 2, as will be explained.

The inner sealing valve disk 14 at the lower end of the housing is shownas overlying an apertured end wall 20 ofthe chamber 12. The valve disks13 and 14 are provided with bores 13a, 14a in which is mounted a valvestem 21 which is adapted to cooperate therewith to control thedispensing of a measured amount of fluid from the container for eachoperation thereof.

' According to the present invention a novel valve stem isprovided whichcomprises inner and outer parts 22, 23,

- preferably formed as tubular members drawn from metal stock, eachhaving a closed inner end 22a, 23a. As shown in the drawings, thediameter of the inner end of the outer member 22 is reduced so that itts, with a forcedt, into the open end of the inner member 23 andsealingly connects the two parts. The outer part ofthe stem passesthrough the bore in the outer sealing disk 13 and through an aperture 24in the Wall 18 and is provided with a shoulder 25 formed by an outwardlyextending annular fold 26 formed in the walls thereof and adapted toengage the underside of disk 12 to form a seal therewith. The outer-memberis also provided with an aperture 27 in the wall thereof normallylocated outwardly of the seal and adapted, when'the stem is moved to thedispensing position of Fig. 2, to connect the inner part of the tubularstem portion 22 with the-measuring chamber to dispense the fluidtherefrom. The inner stem part 23 is provided with a portion of reduceddiameter, herein illustrated as a attened portion 28, which is adaptedto be normally disposed within the bore 13a of the yinner sealing disk13, as shown in Fig. 1, soas to permit the fluid from the container topass into the measuring chamber, which portion is moved out of the boreywhen the stem is moved to its dispensing position, las shown in Figi 2,and permits the stem to seal the passage between the measuring chamberand the container.

It, will be seen, therefore, that the two-part valve stem of the presentinvention can be accurately formed and, by assembling inner portions ofvarying diameter, 'can effectively aid in controlling the volume offluid measured by the measuring chamber since inner portions'of' smallerdiameter can be utilized to enlarge the capacity of. the measuringchamber without changing the size of the chamber in cases where smallincreases in volume are required. In assembling the two-stem portions,Vif desired, the folded portion 26 forming the sealing shoulder can beutilized as a stop during the forced-fitting operation` joining the stemportions.

The stem is normally urged to sealing, position by resilient means. Inthe form` of the invention shown in Figs. l and 2', the resilientmeanscomprises a. spring 29 disposed within the measuring chamber and having.one end located under the folded portion 26 and its other end engaging ametal washer 30 overlying the sealing disk 13 at the inner end. Thisspring normally urges the stem, to the sealing position of Fig. l inwhich the spring presses the shoulder into sealing engagement with thedisk 13 and the measuring chamber is sealed olf until the` stem ismoved'to dispensing position, as shown in Fig. 2,y by overcomingV thepressure of thespring.

The outer end of the stem is provided with a usual button 31 providedwith a bore 31a to receive the end of the stem and a dispensing aperture32 in communication with' the interior of the hollow tubular outer stem22. If desired, the button can be held in Vplace by a. detent actionformed by an outturned rim 22b on the end; of the stem seating in agroove or recess 31b in the bore 31a of the button as shown in Fig. 5.

If desired, means can be provided for limiting the ./i metal extends ina longitudinal direction and facilitates the movement of the. stem inthe bore.

Under some circumstances where the volume of the Y uid to be measured iscritical, it may be desired to diszov movement of the stem in itsdispensing position. While the. bottom of the button can be used forthis purpose, it is: atA present preferred to provide a groove 33 formedin the wall of the outer stem and having av ring 34 snapped therein andadapted to engage, the,l domed wall of the neck, as shown in Fig. 2, tolimit thel linward movement of the stem. This ring may also aid4 instopping the. button 31 as it is inserted over the end of the stem.

If the stem is to be used in4 situations where the container is pressurelled, theV wall of the inner part of the stem is. provided with a pairof spaced. apertures 35, 36 which, when the stem isv moved to itsinnermost `or filling position withV the filling head H Vconnected asshown in Fig. 3 and before the button. and ring are applied, areadapted. to be exposed on either side of and to bypass the inner sealingdisk 14 through the tubular inner, stem part. While the container canbev filled in this positionbythe passage. of fluid along the outer stemandY through theA aperturey 27 in the outer stem into` the chamber andthrough the pair of apertures 35, 36 in the lower stem to the container,means may also be provided for facilitating the passage of uid into thechamber. Preferably, this comprises providing the outer stem. part withaV bypass means, herein illustratedy as an annular channel 37, locatedoutwardly of the aperture 27 so as to be positioned in the bore of theouter disk when the stem is in filling position, as shown in Fig. 3.This permits a greater flow of fluid past the rst seal and permits amorer rapid filling of the container. Preferably, the bypass is solocated that it will be covered by the button, as shown in Fig. 7, whenthe button is appliedto the stem after illing.v

It` will be seen from the foregoing that the stern in moving to and fromthe sealing, dispensing and filling positions moves longitudinallythrough the. bores in the sealing disks 13vand 14. By making the twoparts of the stems of drawn metal it has been discovered that a muchsmoother action is obtained since the grain of' the pose the springoutside of the measuring chamber. In the form of the invention shown inFig. 4, a cap 3S having a perforation 39 in the bottom thereof ismounted over the end of the outer stem portion and the spring 29 isdisposed between the outwardly turned inner end 38a of the cap and thedomed portion 13 of the neck to normally urge the stem-to sealingrelation.

In the form of the invention shown in Fig. 5, the

measuring chamber has an additional spring housing 40 mounted on thebottom of the chamber and the inner sealing disk 14 is disposed in theupper end of the spring housing and is urged against the bottom 20 ofthe measuring chamber by an outer spring 41 while usual spring 29 ismounted within the housing to bear against the bottom of the stem andurge it to its outermost position.

In the form of the invention shown in Fig. 6, a large measuring chamber12a is employed as might be used for cosmetic or toilet goods itemsincluding foam type products such as shaving cream or the like material.In order to mount the chamber in the neck 17, it is provided with anoutward radial flange 15a and has a forwardly projected flange 16a atthe periphery thereof which is mounted in the neck by a forced t or byother suitable means. A transverse member 42 having a flange 43supported on the ange 15a of the chamber and overlying the flange 16aextends over the end of the measuring chamber and is shaped to form arecess 44 in the face thereof in which the outer valve disk 13 ispositioned with the wall` of the recess underlying the disk .controllingthe flexing of the disk during the operations thereof.

In the form of the invention shown in Fig. 7, a very small measuringchamber 12b as might be used for pharmaceuticals or the like isillustrated. In order to mount this in the neck of the container, alarge annular fiange 15b is provided having a peripheral flange 16badapted to lbe, forced-fit into the neck.- The outer valve disk 13overlies the annular flange 15 and in order to prevent they annularflange from too tightly clamping the disk, the neck has a steppedportion 17a therein which limits the movement of the flange 15b as it isforced-tit into the neck and limits and confines the gripping by theportion 18a to the edge of the valve disk 13 and controls its flexing'`during the operation of the valve stem.

VWhen the valve of the present invention is to bc mounted on the mouthof abottle or jar B shown in Fig. 12, the measuring chamber 12 isprovided with a liat annular flange 15 which extends out and overliesthe end of the mouth of the bottle or the like container. A seal.- ingwasher or ringy 45 is disposed between the lange 15 and themouth of thecontainer and the mounting means for the valve comprises a stepped skirtor member 46 having a shoulder 47 overlying the flange 15 and a ange 48which extends down and around and is clamped ou a shoulder 49 on theouter surface of the container to seal the container and hold the valvein position thereon. The shoulder controls the clamping of the valvedisk in the manner of the shoulder 17a in Fig. 7.

Should it be desired, means may be provided to seal oi the outer endY ofthe stem. In the form of the invention shown in Figs. 8-l1, the end ofthe stem is provided with a dispensing button 50 having an aperture 50a,said button being mounted for limited rotation on the stem so that itcan be turned from the sealed position of Fig. 9 to the dot-and-dashposition of Fig. l0 to line up the aperture 50a with the passage topermit dispensing of the fluid. In the form of the invention illustratedin Fig. 10 the stem is held against rotation by forming the aperture inthe bottom wall 20 of the measuring chamber with a flat portion 51 tocoact with the flattened portion 28 on the stem and function as a loosekeyway. The button -can be used with the two-part stem of Figs. l-4 orcan be used with a solid stem, as shown in Fig.V 8, wherem a groove 52is provided in the stem and is closed by a sleeve 53 having apertures27b and 27e arranged to overlie the groove and form a dispensing passagetherein. If desired, the top of the button 50 and the closed end of thesleeve on the stem can be provided with indicia 53, 54 to disclose thelocation of the aperture in the button with respect to the passage inthe stem in sealed or dispensing position. l

In all forms of the invention a dip tube 55 is connected to the lowerend of the measuring chamber in order to conduct the liquid from thecontainer to the measuring chamber. Preferably, the bottom of the diptube is sealed E, as shown in Figs. 13 and 14, and is provided with asmall aperture 56 which retards the flow of the liquid from the bottomof the tube andprevents gas from inadvertently passing into the tube todisplace liquid in the tube.

Intsead of using the folded wall of the outer stem as a sealing meansfor the stem as shown in Fig. l, the present invention provides anotherform of sealing means for the container wherein the inner member 63 isprovided with a ared bell-shaped mouth 64 and is adapted to receive theouter member 65, as shown in Figs. and 16, with the mouth spacedradially from the outer member and forming an abutment 66 engaging theundersurface of the outer valve disk 13 to seal the same. This form ofseal is particularly effective when used in connection with powder orpowdered aerosols v since it permits an aperture 67 in the wall of theouter member through which the powder passes to be located below thedisk and to be exposed as soon as the seal is broken 'at the belledmouthso that the aerosol will propel the powder through the tubularouter member 65 of the stem and through the dispensing button 31.

As shown in Fig. 15, the stem is employed in a non- Y metering valve,and as shown in Fig. 16 the stem is employed in a metering valve. outerstem member 65 is provided with a shoulder 66 adjacent the outer face ofthe valve disk 13 which causes said valve disk to move inwardly alimited amount before the disk exes and the seal is broken. This enablesan accurate control of the dispensing, and particularly where ameasuring chamber 12 is involved for metering the contents of. thecontainer, it permits the bottom seal to be completed at the inner valvedisk 14 prior to the opening of the seal at the outer valve disk 13.

Variations and modifications may be made within the scope of the claimsand portions of the improvements may be used without others.

I claim: n 1. In a valve means for controlling the discharge of ameasured amount of uid under pressure from a container having a tubularmeasuring chamber, a combined resilient sealing gasket and first valvedisk having a bore mounted at the outer end of the chamber and a secondresilient valve disk having a bore mounted adjacent the inner end of thechamber, a valve stem mounted in said chamber and having portionsextending through the bores in the valve disks and a sealing portioncooperating with the first disk to seal the container and a portion atthe inner end passing through the second valve disk and having means tocontrol passage of fluid from the -container to the chamber, and meansurging the stem into sealing position, movement of said stem against theurging means a predetermined distance from normal sealing position to adispensing position causing said sealing portio-n to be moved out ofsealing relation with the first valve disk and causing the stem tocooperate with the second valve disk to seal the chamber from thecontainer prior to the breaking of .the seal at the first valve disk,thereby dispensing only the fluid in the measuring chamber, theimprovement wherein said stem comprises an inner and outer tubularmember, each having aclosed inner end, the

It will be noted that the.

other end of the inner member being sealingly secured to the inner endof the outer member and wherein the means cooperating with the secondvalve disk comprises a portion of reduced diameter on the inner memberadapted to be normally disposed in the bore thereof and connect thechamber with the container and to be moved out of the bore when thestern is moved todis-y pensing position.

2. In .a valve means for controlling the discharge of a measured amountof uid under pressure from a container having a tubular measuringchamber and a valve stem mounted for reciprocation in `said chamber tocontrol passage of fluid from the container to the chamber and todispense the measured charge from the chamber, and means for mountingthe valve means on said container, the improvement wherein the means formounting the valve means on the container comprises a neck portion ofthe container and an outwardly extending annular flange on the outer endof the measuring chamber having a rearwardly extending ange yat the edgethereof adapted to be forced-fit into said neck.

3. In a valve means for controlling the discharge of a measured amountof fluid under pressure from a container having a tubular measuringchamber and a valve stem mounted for reciprocation in said chamber tocon-- trol passage of tluid from the container to the chamber and todispense the measured charge from the chamber, and means for mountingthe valve means on said con-Y tainer, the improvement wherein the meansfor mount# ing the valve means on the container comprises a neck portionof the container having a shoulder in predetermined location therein andan outwardly extending annular flange on the outer end of the measuringchamber having a rearwardly extending flange at the edge thereof adaptedto be forced-fit into said neck with the shoulder limiting `theinsertion of the annular flange into the neck.

4. VIn a valve means for controlling the discharge of a measured amountof fluid under pressure from a container having a tubular measuringchamber and a valve stem mounted for reciprocation in said chamber tocontrol passage of fluid from the container to the chamber and todispense the measured charge from'the chamber, and means for mountingthe valve means on said container, the improvement wherein the containerhas an open mouth and an annular shoulder on the container adjacent theopen mouth and the means for mounting the valve means on the containercomprises an annular flange on the chamber engaging a sealing ringdisposed on the mouth of the container and extending under a first valvedisk and a stepped skirt having a shoulder engaging the flange with theedge of the skirt gripping the annular shoulder on the container.

5. In a valve means for controlling the discharge of a measured amountof fluid under pressure from a container having a tubular measuringchamber and a valve stem mounted for reciprocation in said chamber tocontrol passage of fluid from the container to the chamber and todispense the measured charge from the chamber, and means for mountingthe valve means on said container, theimprovement wherein the measuringchamber is of substantially larger diameter than the stem and wherein acontrol plate is disposed between the end of the chamber and a firstsealing disk to control flexing of the portion of the disk overlying theend of the chamber.

6. In a valve means for controlling the discharge of a measured amountof fluid under pressure from a container having a tubular measuringchamber, a rst combined resilient sealing gasket and first valve diskhaving a bore mounted at the outer end of the chamber and a secondresilient valve disk having a bore mounted adjacent the inner end of thechamber, a valve stem mounted in said chamber and having portionsextending through the bores in the valve disks and a sealing portioncooperf ating with the first diskto seal the container and a portion 'i'at the inner end passing through the second valve disk and having meansto control passage of fluid from thecontainer to the chamber, and meansurging the stem into sealing position, movement of said stem against theurging means a predetermined distance from normal sealing position to adispensing position causing said sealing porn tion to be moved out ofsealing relation Vwith the rst valve disk and causing the stem tocooperate with the second valve disk to seal the chamber from thecontainer prior to the breaking of the seal at the rst valve disk,thereby dispensing only the fluid in the measuring chamber, theimprovementv wherein said stem comprises inner and outer tubularmembers, each having a closed inner end,.the open end of the innermember being sealingly secured to the inner end of the outer member andsaid stem having a sealing abutment, said sealing abutment comprising anannular fold in the wall of the outer member projecting radially andforming a shoulder to engage the first valve disk in sealing position ofthe stem and form a seal therewith.

7. In a valve means for controlling the discharge of a measured amountof iluid under pressure from a container having a tubular measuringchamber, a irst cornbined resilient sealing gasket and rst valve diskhaving a bore mounted at the outer end of the chamber and a secondresilient valve disk having a bore mounted adjacent the inner end of thechamber, a valve stem mounted in said chamber and having portionsextending through .the bores in the valve disks and a sealing portioncooperating with the first disk to seal the container and a portion atthe inner end passing through the second valve disk and having means tocontrol passage of uid from the container to the chamber, and meansurging the stem into sealing position, movement of said stem against theurging means a predetermined distance from normal sealing position to adispensing position causing said sealing portion to be moved out ofsealing relation with the rst valve disk and causing the stem tocooperate with the second valve disk to seal the chamber from thecontainer prior to the breaking of the seal at the lirst valve disk,thereby dispensing only the iluid in the measuring chamber, theimprovement wherein said stem comprises inner and outer tubular members,each having a closed inner end, the :open end of the inner member beingsealingly secured to the inner end of the outer member and said stemhaving a sealing abutment, said sealing abutment comprising abell-shaped mouth on the inner member adapted to engage the rst valvedisk in sealing position of the stern and form a seal therewith.

8. In a valve means for controlling the discharge of a measured amountof iluid under pressure from a container having a tubular measuringchamber, a iirst combined resilient sealing gasket and lirst valve diskhaving a bore mounted at the outer end of the chamber and a secondresilient valve disk having a bore mounted adjacent the inner end of thechamber, a valve stem mounted in said chamber and having portionsextending through the bores in the valve disks and a sealing portioncooperating with the first disk to seal the container and a portion atthe inner end passing through the second valve disk and having means tocontrol passage of fluid from the container to the chamber, and meansurging the stem into sealing position, movement of said stern againstthe urging means a predetermined distance from normal sealing positionto a dispensing position causing said sealing portion to be moved out ofsealing relation with the tirst valve disk and causing the stem tocooperate with the second valve disk to seal the chamber from thecontainer prior to the breaking of the seal at the rst valve disk,thereby dispensing only the fluid in the measuring chamber, theimprovement wherein said stem is adapted to be moved toan innermostfilling position and comprises inner and outer tubular members, eachhaving a closed inner end, the open end of the inner member beingsealingly secured to the inner end of the outer member and wherein theouter member has Va bypass recess in the wall thereof and said innermember having spaced apertures in the wall thereof,v said bypass.vrecess being adapted to` be located Within the bore. of the rst sealingdisk and said spaced apertures being adapted to be located on oppositesides of said second valve disk when the stem is in filling position tobypass said second disk.

9. In va valve means forfcontrolling the discharge of a measured amountof fluid under pressure from a con` tainer having a tubular measuringchamber, a rst combined resilient sealing gasket and first valve diskhaving a bore mounted at the outer end of the chamber and a secondresilient valve disk having a bore mounted adjacent the inner end of thechamber, a valve stem mounted in said chamber and having portionsextending through the bores in the valve disks and a sealing portioncooperating with the vlirst disk to seal the -container and a portion atthe inner end passing through the second valve disk and having means tocontrol passage of tluid from the container to the chamber, and meansurging the stem into sealing position, movement of said stem againstvthe urging means a predetermined distance from normal sealing positionto a dispensing position causing s'aid sealing portion to be moved outof sealing relation with the first valve disk and causing the stem tocooperate with. the second valve disk to seal the chamber from thecontainer prior to the breaking of the seal at the irst valve disk,thereby dispensing only the uid in the measuring chamberthe improvementwherein said stem is adapted to be moved to an inner-most fillingposition and comprises inner and outer tubular members, each having aclosed inner end, the open end of the inner member being seal# inglysecured to the inner end of the outer member and wherein the outermember has an aperture in the side wall normally located outside of themeasuring chamber and adapted to be moved into communication with saidchamber in dispensing position of said stem to permit fluid in saidchamber to pass therethrough and along the upper tu-v bular member anddispensed from said chamber, and has an annular bypass recess in thewall thereof spaced outwardly from said aperture along the stem and saidinner member having means cooperating with the second valve diskcomprising a flattened wall portion of the inner member adapted to benormally disposed in the bore of said second valve disk and connect thechamber with the container and to be moved out of the lbore when thestem is moved to dispensing position and having spaced apertures in thewall located outwardly along the stem from said flattened Wall, saidannular recess being adapted to 'be located Within the bore ofthe firstsealing disk and said spaced apertures being adapted to be located onopposite sides of said second seal when the stem is in lilling position.

10. In a valve means for controlling the discharge of a measured amountof iluid under pressure from a container having a tubular measuringchamber and a valve stem mounted for reciprocation in said chamber tocontrol passage of fluid from the container to the chamber and todispense the measured charge from the chamber, and means for mountingthe valve means on said container, the improvement wherein said stemcomprises inner and outer tubular members, each having a closed innerend, the open end of the inner member being seal ingly secured to theinner end of the outer member and the outer `member having an aperturein the side Wall normally located outside of the measuring chamber andadapted to be moved into communication with said chamber in dispensingposition of said stem to permit fluid in said chamber to passtherethrough and along the outer tubular member and dispensed from saidchamber.

1l. in a valve means for controlling the discharge of a measured amountof tluid under pressure from a container having a tubular measuringchamber, a iirs't combined re silient sealing gasket and rst valve diskhavin-g a bore mounted at the outer end of the chamber and a secondresilient valve disk having a bore mounted adjacent the inner end of thechamber, a valve stem mounted in said chamber and having portionsextending through the bores in the valve disks and a sealing portioncooperating with the rst valve disk to seal the container and a portionat the inner end passing through the second valve disk and having meansto control passage of uid from the container to the chamber, and meansurging the stem into sealing position, movement of said stem against theurging means a predetermined distance from normal sealing position to adispensing position causing ysaid s'ealing portion to be moved out ofsealing relation with the rst valve and causing the stem to cooperatewith the second valve disk to seal the chamber from the container priorto the breaking of the seal at the rst valve disk, thereby dispensingonly the fluid in the measuring chamber, the improvement wherein saidstem comprises inner and outer tubular members, each having a closedinner end, the open end of the inner member being sealingly secured tothe inner end of the outer member and the outer member having anaperture in the side wall normally located outside of the measuringchamber :and adapted to be moved into communication with said chamber indispensing position of said stem to permit uid in said chamber to passtherethrough and along the outer tubular member and dispensed from saidchamber.

12. A valve stem for use in a metering valve for uids and having ameasuring chamber provided with an inner andan outer valve disk havingstem-receiving bores therein comprising an inner and an outer tubularmember, each having a closed inner end and an open `outer end, the innerend of the outer member being forced-fit into the open end of the innermember, the outer member having an aperture in the Wall thereof adaptedto be normally located outwardly of the outer valve disk and to be movedinto the chamber in dispensing position to dispense fluid therefrom, andthe inner member having a attened wall portion adjacent the inner endthereof adapted to be normally located in the bore in the inner valvedisk and to be moved out of said bore when the stem is moved todispensing position whereby said stem seals the bore in said inner valvedisk.

13. A valve stem for use in a metering valve for uids and having ameasuring chamber provided with an inner and an outer valve disk havingstem-receiving bores therein comprising an inner and an outer tubularmember, each having a closed inner end and an open outer end, the innerend of the outer member being forced-tit into the open end of the innermember, the outer member having an aperture in the wall thereof adaptedto be normally located outwardly of the outer valve disk and to be movedinto the chamber in dispensing position to dispense uid therefrom, andthe inner member having a llattened wall portion adjacent the inner endthereof adapted to be normally located in the 'bore in the inner Valvedisk and to be moved out of said bore when the stem is moved todispensing position whereby said `stem seals the bore in said innervalve disk, said inner and'outer members having bypass means located inpredetermined relation therein adapted to bypass said inner and outervalve disks in tilling position of said stem.

14. A valve stem for use in a metering valve for fluids and having ameasuring chamber provided with an inner and an outer valve diskcomprising inner and outer tubular members, each having a closed innerend and an open outer end, the inner end of the outer member being ofreduced diameter and being adapted to be forced fit into the open end ofthe inner member, the outer member having an annular projecting foldadjacent the portion of reduced diameter and yadapted to engage theouter valve disk to form a seal therewith and an aperture in the wallthereof spaced outwardly along the stem and adapted to be normallylocated outwardly of the outer valve disk and to be moved into thechamber in dispensing position to dispense fluid therefrom, and theinner member having a attened wall portion adjacent the inner endthereof adapted to be normally located in a bore in the inner valve diskand to be moved out of said bore when the stem is moved to dispensingposition whereby said stem seals the bore in said inner valve disk.

l5. In a valve for use on a container having uid under pressure, saidvalve having a reciprocating valve stem provided with a passage thereinand a dispensing button on the outer end thereof having a dispensingaperture therein, the improvement wherein said button is rotatable onsaid stem from a sealing positionr in which the aperture is out ofcommunication with said passage to a dispensing position in which theaperture communicates with said passage to dispense.

16. The invention as defined in claim 15 wherein means is provided onthe stem and button to indicate the rotative position of the button onthe stem.

17. In a valve for use on a container having fluid under pressure, saidvalve having a reciprocating valve stem provided with a passage thereinand a dispensing button on the outer end thereof having a dispensingaperture therein, the improvement wherein said button has a bore toreceive said stem and a recess in said bore and said stem has anoutwardly projecting portion adapted to snap into said recess and holdthe button in position thereon.

1,8. In an aerosol device comprising a container having means includinga measuring chamber for dispensing a predetermined quantity of fluidunder predetermined gas pressure therefrom, and a dip tube having oneend connected to the chamber and the other end extending into thecontainer to conduct uid to the chamber, the improvement wherein saidother end of said tube is provided with a restricted opening to preventgas from passing to the chamber to displace the uid therein whereby uidis retained in said chamber to insure accurate quantities beingdispensed therefrom.

References Cited in the tile of this patent UNITED STATES PATENTS2,667,991 Boyer Feb. 2, 1950 2,693,983 Howell Nov. 9, 1954 2,721,010Meshberg Oct. 18, 1955

